All About The Sun
By: Tanner Gross
The core
The Sun's core is the central region where nuclear reactions consume hydrogen to form helium. These reactions release the energy that ultimately leaves the surface as visible light. These reactions are highly sensitive to temperature and density.
The Radiative Zone
In the radiative zone of the sun, energy is primarily transported toward the exterior by means of radiative diffusion and thermal conduction.
http://www.windows2universe.org/sun/Solar_interior/Sun_layers/radiative_zone.html
Convective Zone
The convective zone is a region of turbulent plasma between a star's core and its visible photosphere at the surface, through which energy is transferred by convection.
The Photosphere
The photosphere is the visible surface of the Sun that we are most familiar with.
The Chromosphere
The chromosphere (literally, "sphere of color") is the second of the three main layers in the Sun's atmosphere and is roughly 2,000 kilometers deep. It sits just above the photosphere and just below the solar transition region.
https://en.wikipedia.org/wiki/Chromosphere
Corona
The corona is an aura of plasma that surrounds the sun.